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.9% of the universe. vast majority is a complete mystery. two invisible things called dark matter and dark energy is so cool and sean carroll is here to tell us what these numbers mean. some of our theories and our numbers about the world had to be revised this week. you say the biggest thing to come from this study is actually how accurate the old numbers were. tell me about it. >> i think it's a great accomplishment that we can build this telescope. we look at leftover light from the big bang and we definitely learned a lot. we had better numbers now than we had before. basically we're right. we kind of understand what the universe is doing. we don't know why it's doing that. we don't understand the ingredients it's made of very well but nice to know we have a good starting point to think of what the universe really is. >> how do these red, yellow and blue dots in this baby picture of our world, how do they help scientists understand how the universe evolves. walk me through what we're seeing there. >> what we see there is a snapshot of the universe about 380,000 years after the big bang. it wa
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